How do I encode and split longer videos into segments?

1. Add source via AddMediaBenchmark API call.
 
XML should reflect the following:
<?xml version="1.0"?>
<query>
    <userid>xxx</userid>
    <userkey>yyy</userkey>
    <action>AddMediaBenchmark</action>
    <source>http://domain.com/source/file/url</source>
</query>
2. Store Media ID returned by API for next 2 steps.
 
3. Get media duration by using GetMediaInfo call.
 
<?xml version="1.0"?>
<query>
    <userid>xxx</userid>
    <userkey>yyy</userkey>
    <action>GetMediaInfo</action>
    <mediaid>3402153</mediaid>
</query>

API will return the following XML:

<?xml version="1.0" ?>
<response>
    <bitrate>518k</bitrate>
    <duration>723.09</duration>
    <audio_bitrate>256K</audio_bitrate>
    <audio_duration>1253</audio_duration>
    <video_duration>1253</video_duration>
    <video_codec>mpeg2video</video_codec>
    <frame_rate>29.97</frame_rate>
    <size>320x240</size>
    <video_bitrate>104857k</video_bitrate>
    <pixel_aspect_ratio>1:1</pixel_aspect_ratio>
    <display_aspect_ratio>4:3</display_aspect_ratio>
    <audio_codec>mp2</audio_codec>
    <audio_sample_rate>44100</audio_sample_rate>
    <audio_channels>2</audio_channels>
    <format>mpeg-ps</format>
    <format_profile>Main@Main</format_profile>
    <scan_type>Progressive</scan_type>
</response>
Pay attention only the <video_duration>1253</video_duration> tag. 
Based on the video duration they should calculate how many segments they will have for given segment lenght. For this particular example and their segment lenght = 600s here will be 3 segments 600+600+53 seconds.
 
4. Update media and add formats based on calculated number of segments. 
<?xml version="1.0"?>
<query>
    <userid>xxx</userid>
    <userkey>yyy</userkey>
    <action>UpdateMedia</action>
    <mediaid>3402153</mediaid>
    <format>
        <output>mp4</output>
        <start>0</start>
        <duration>600</duration>
    </format>
    <format>
        <output>mp4</output>
        <start>600</start>
        <duration>600</duration>
    </format>
    <format>
        <output>mp4</output>
        <start>1200</start>
        <duration>53</duration>
    </format>
</query>
Important! You should add all formats by one UpdateMedia call.
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